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OC_Gunner 07-09-2013 10:06 PM

Black Dog mags not working out...
Picked up two black dog mags at LGS, guy behind the counter ensured me they would work in my CMMG upper/NFA lower rifle. With both mags, at least one round feeds into the bolt carrier vertically which obviously causes a jam that requires pliers to remove.

Am I doing something wrong or is it not meant to be? For the record, the same ammo feeds flawlessly using te CMMG evolution mag that I bought last year with the upper.

2DoorImpala 07-09-2013 10:37 PM

Feed lips, might want to check the gap measurement

uxo2 07-09-2013 10:57 PM

what model of mags

BD has a few generations.

Pics please.

I run BDs in my Plum crazy Lower.
Pre NFA but same..

No isssues .

OC_Gunner 07-10-2013 6:38 AM

Here is a link to the same mags I bought:

Website says new x form 4th gen with steel feed lips.

I didn't take a pic of the jam but I bet I could replicate it later with dummy rounds and snap a pic.

uxo2 07-10-2013 7:57 AM

That is strange.
Those are their newest mags.
Call blackdog.
They are pretty good on cutomer service.

bollero 07-10-2013 8:17 AM

Those new mags work fine in my AR with 22lr ceiner convertion..

G21Shooter 07-10-2013 10:45 AM

I have never had a problem with Blackdog mags with my CMMG .22 lr upper. I do only use the steel lip ones, though.

I would contact Blackdog

Jet Setter 07-10-2013 12:30 PM

Blackdog Mags are fantastic. You probably have a follower issue. Call Blackdog and let them know what is going on. They will send you different followers for free. They have great service and will take care of you.

Casual_Shooter 07-10-2013 12:39 PM

FWIW- I bought a couple of used Black Dog .22lr mags for my CMMG .22lr upper. First 5-6 rounds would feed no problem. Then it would jam just like you describe.

I figured it was because the mags were used (and a little abused)- followers would catch a bit at the top etc. Although mine are slightly different than the ones in the link above. I believe mine have plastic feed lips.

Looking forward to what you find out. 07-10-2013 1:04 PM

The plastic lips will expand over time. Happened to my BDM mags. Go with the metal lipped versions and you are good to go.

OC_Gunner 07-10-2013 1:07 PM

OK I will call black dog and see what they say.

uxo2 07-10-2013 5:11 PM

I have afew 1st gen BDs and never
have had feedlip issues.

You probly got the ones the QC was sleeping.

3RDGEARGRNDRR 07-10-2013 5:31 PM

I only run black dog. Metal and plastic feed lips. No issues w/ 8 mags all different types of black dog.
I had an early issue of my cmmg feeding vertically. I solved the problem by buzzing and polishing the feed ramp and chamber. No ftc now.

Tom-ADC 07-11-2013 6:45 AM

The Spikes upper I just bought comes with one and I just ordered a few more to use with it.

kkp 07-18-2013 5:37 PM

Does anyone make 10 round conversion kits so new hicap rebuild kits can be built into 10 round mags?

joker70 07-18-2013 8:29 PM

I have the same CMMG/NFA setup with BD mags that I bought new last year so probably one generation older. Polymer feed lips that look just like the feed lips on the link. No issues with any kind of bulk 22lr ammo I've used.

lolkopter 07-19-2013 8:07 AM

Same issue here

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